<template>
  <div class="todo-header">
    <input
      type="text"
      placeholder="请输入你的任务名称，按回车键确认"
      @keyup.enter="addNewTodo"
    />
  </div>
</template>

<script lang="ts">
import { defineComponent } from 'vue';

export default defineComponent({
  name: 'Header',
});
</script>

<script setup lang="ts">
// 引入
import { nanoid } from 'nanoid';
import { ref } from 'vue';
import { todoItemType } from '../../App';

const emit = defineEmits<{
  (event: 'addNewTodo', newTodo: todoItemType): void;
}>();

// 添加单项
const addNewTodo = (e: KeyboardEvent) => {
  const newThing = (e.target as HTMLInputElement).value;
  if (!newThing) return;
  const newTodo = { id: nanoid(), thing: newThing, done: false };
  emit('addNewTodo', newTodo);
  (e.target as HTMLInputElement).value = '';
};
</script>

<style scoped lang="scss">
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075),
    0 0 8px rgba(82, 168, 236, 0.6);
}
</style>
